URL:
<http://savannah.gnu.org/bugs/?func=detailitem&item_id=16579>
Summary: select_shell() uses incorrect syntax for su
Project: findutils
Submitted by: ametzler
Submitted on: Samstag 13.05.2006 um 14:24
Category: updatedb
Severity: 3 - Normal
Item Group: None
Status: None
Privacy: Public
Assigned to: None
Originator Name: Chronos Tachyon
Originator Email:
Open/Closed: Open
Release: 4.2.27
Fixed Release: None
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Details:
Chronos Tachyon writes in http://bugs.debian.org/366269
The select_shell() function in /usr/bin/updatedb has a bug in the way it
calls /bin/su; specifically, it attempts 'su "$LOCALUSER" -s $SHELL false',
which runs '/bin/bash false', thus attempting to execute /bin/false as a
shellscript. (The exit code 126 and error message 'cannot execute binary
file' are ignored entirely by updatedb.)
The correct usage of su would be to add "-c" after "-s $SHELL" on lines 87
and 91. This is important if, for instance, the administrator has set
$LOCALUSER's shell to /bin/false (which is how I discovered this bug).
----------------------------
Older versions of su as found on Debian (e.g. in sarge) accepted this syntax,
but this is consideerd a bug.
cu andreas
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